If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

Elsewhere, users can now also access password-protected workbooks on Excel for the Web, meaning there's no need to switch back to a desktop in order to open & interact with secured files.

It is possible to create a macro in an Excel sheet that unlock the sheet which is already protected by a password. Users can easily prepare a document in the sheet and then lock it again with a ...

If you see The file couldn't open in protected view error while opening Microsoft Excel, the fixes listed in this post will help you.

Unlocking Password-Protected Excel Files With Read-Only Sometimes the Excel workbook you are trying to open is password protected.

You can make Excel always open old spreadsheets in Protected View. Enable or disable Protected View using in-built setting, Group Policy, Registry.